Sheet-metal radiator



(No Model.) I

' LE ROY S.'BUNKER. SHEET METAL RADIATOR.

No. 545,036. Patented Aug. 20, 1895).

7 Unwrap Snares PATENT @rnicn.

LE ROY S. BUNKER, OF WEBSTER CITY, IO'WA.

SH EET-M ETA'L RADIATOR.

SIPECIFICATION forming part of Letters Patent No. 545,036, dated August 20, 1895.

Application filed February '26, 1895. Serial No. 539,742. (No model.)

To aZZ whom, it may concern.-

Be it known that I, LE RoY S. BUNKER, a citizen of the United States of America, residin g at WVebster City, in the county of Hamilton and State of Iowa, have invented Improvements in Sheet-Metal Radiators, of which the following is a specification.

My invention relates to the construction of sheet-metal radiators; and it consists in certain new and useful improvements in a radiator invented by me, and fully described in my application for United States Letters Pat ent filed February 20, 1894, Serial No. 500,931,

whereby a simpler, cheaper, more durable,

and lighter radiator is produced.

My invention consists in certain details of construction of the various parts of the radiator, as hereinafter set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which- Figure l is a side elevation of a part of a radiator. Fig. 2 is a sectional view of one of the radiator-sections. Fig. 3 is a sectional view through the line 3 3 of Fig. 2. a perspective view of one of the supports. Fig. 5 is a detail sectional view of one of the nuts for holding the sections together.

Referring to the accompanyingdrawings, the reference-letter A is used to indicate one of the mating side pieces of one radiator-section. Each piece is of an approximately oval shape with its central portion bent inwardly at A to engage the opposite part and thus form a continuous passage around the edges of the section. Its edges are bent straight outwardly at B, then curved at B to overlap the outwardly-bent portion, leaving a space between. of the part A a circular opening is formed with an annular outwardly-bent shoulder C concentric with the opening. The parts A are formed of stiff sheet metal, and bending the edges together to produce a steam-tight joint has been found quite difficult. I have obviated this objectionable feature by bending the edges, as shown, and then providing a narrow strip of soft flexible metal D and bending its edges over the parts 13 and then into the spaces between the parts 13 and B and finally firmly pressing the seam thus formed, thereby causing any irregularities in the stiff metal to become embedded into the Fig. 4 is In the central portion of each end softer metal, and thus produce a steam-tight joint.

F indicates a bushing for the openings on the end portions of the section, preferably made of cast metal, with a central opening of smaller diameter than the said opening, an annular flange F projecting outwardly from one'end with its outer surface in engagement with the edges of the opening, and an annular depression F in its opposite end. "The flange F and depression F are designed to ooaot with the co-operating features in adjacent sections. In the central portion of each bushing are a'number of radial openings H. H indicate lugs projecting inwardlys from the bushings between the said openings, for purposes hereinafter explained. These bushings are placed in position before the two sides of the section are placed together. It is obvious that a number of sections may be placed together with the annular flanges F on one section entering the depressions F on the adjoining section, and when firmly drawn together a tight connection will be produced. To draw these sections together I have provided a perforated pipe J of a somewhat smaller diameter than the opening in the bushings and screw-threaded at both ends. Two of these pipes are used of a length to extend through all of the sections of the radiator, the one at the top and the other at the bottom, in engagement with the lugs H which serve to keep the pipe concentric within the bushings. For the outer surfaces of the end sections I have provided a nut K, having a central screw-threaded opening adapted to admit the end of the pipe J, and an annular shoulder K adapted to enter the depression F The nuts IWI for the oppositeends are provided with annular grooves M instead of the shoulder K and the lower one for the end where the supply-pipe is admitted has its central bore extended entirely through the nut, thus providing for the admission of the supply-pipe.

For supporting the complete radiator I have provided a device cast complete in one piece and having a groove N in its top adapted to admit the edges of the end section and the integral legs N In practical use it is obvious that the steam will freely circulate through all parts of the radiator, passing from one end to the other through the pipes, .and freely circulating through each section through the perforations in the pipes and bushings.

Having thus described my invention, What I claim as new therein, and desire to secure by Letters Patent of the United States therefor, 1s-

1. The combination with a sheet metal radiator section of a bushing device, cast complete in one piece having an annular projection on one end and a mating depression on the other, radial openings in its central portion and inwardly projecting lugs between the openings, for the purposes stated.

2. A sheet metal radiator, comprising a number of sheet metal sections each having annular shoulders at its ends and openings in LE ROY S. BUNKER. lVitnesses:

JAMES KEPHART, W. E. SMIsoR. 

